Pests
Tetranychus urticae
The spider mite is an arachnid that damages plants by sucking out cell sap and chlorophyll. The damage manifests as yellowing, curling, and drying of leaves, which leads to a significant reduction in yield.
Mentioned in descriptions 1 326 varieties reference book.
The spider mite is a dangerous pest that pierces the leaf epidermis and sucks out cell sap, leading to the destruction of chloroplasts and the inhibition of photosynthesis. Initial signs of infestation include the appearance of small light spots on the upper side of the leaf. In advanced cases, a fine web and colonies of the pest are found on the underside of the leaf, and the plant itself turns yellow, dries up, and can lose up to 60% of its yield.
The rate of reproduction and the degree of damage directly depend on temperature and humidity: at +25...+30°C and humidity below 60%, the pest's development cycle shortens to 5–7 days. A favorable factor for mite feeding is excessive nitrogen nutrition, which makes plant tissues looser. Furthermore, crop vulnerability often depends on agronomic practices, as mites are prone to developing resistance rapidly.
A variety's resistance to spider mites is determined by morphological features, such as leaf blade density or the presence of trichomes, as well as biochemical characteristics. No unified international coding system for such resistance exists; therefore, in descriptions, it is usually assessed qualitatively as "tolerance" or "relative resistance." When selecting a variety, it is recommended to clarify the evaluation methodology, including the conditions of field trials or artificial infestation.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Ribes nigrum L. · Blackcurrant
Estonian University of Life Sciences Institute of Agricultural and Environmental Sciences Polli Horticultural Research Centre
Corylus avellana L. · Common hazel
OREGON STATE UNIVERSITY (US)
Ribes nigrum L. · Blackcurrant
Prof. Dr. V. P. Kopan c/o Institute of Horticulture
Ribes nigrum L. · Blackcurrant
Estonian University of Life Sciences Institute of Agricultural and Environmental Sciences Polli Horticultural Research Centre
Trifolium subterraneum L. · Subterranean clover
WESTERN AUSTRALIA,DEP.AGR
Ribes nigrum L. · Blackcurrant
Prof. Dr. V. P. Kopan c/o Institute of Horticulture
Ribes x nidigrolaria Rud. Bauer et A. Bauer · Jostaberry
Rolf Bauer
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Citrus reticulata Blanco · Mandarin orange
Yosef Yaniv^^^Yeoshua Kanonich^^^Tal Amit^^^Nir Carmi
Corylus avellana L. · Common hazel
Narcissus L. · Daffodil
World Flower B.V.
Rubus idaeus L. · Red raspberry
SCOTTISH CROP RESEARCH INSTITUTE
Cucumis sativus L. · Cucumber
HANNONG SEEDS
Corylus avellana L. · Common hazel
Institut National de la Recherche Agronomique (FR)/ANPN (FR)
Capsicum annuum L. · Bell pepper
Syngenta Seeds B.V.
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Lupinus luteus L. · Yellow lupin
BRUMMUND| Dr. Martin Brummund in Fa. Saatzucht Bornhof GmbH / DIETRICH| Wolf-Heinrich Dietrich in Fa. VEG Saatzucht Bornhof
Ribes nigrum L. · Blackcurrant
Estonian University of Life Sciences Institute of Agricultural and Environmental Sciences Polli Horticultural Research Centre
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Ribes nigrum L. · Blackcurrant
Estonian University of Life Sciences Institute of Agricultural and Environmental Sciences Polli Horticultural Research Centre
Cucumis sativus L. · Cucumber
NONGWOO BIO CO.LTD
Ribes nigrum L. · Blackcurrant
Johannes Parksepp 100%
Ribes nigrum L. · Blackcurrant
Estonian University of Life Sciences Institute of Agricultural and Environmental Sciences Polli Horticultural Research Centre
Ulmus minor Mill. · Field elm
Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)